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freebsd-dev/sys/sparc64/include/tsb.h

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Flesh out the sparc64 port considerably. This contains: - mostly complete kernel pmap support, and tested but currently turned off userland pmap support - low level assembly language trap, context switching and support code - fully implemented atomic.h and supporting cpufunc.h - some support for kernel debugging with ddb - various header tweaks and filling out of machine dependent structures
2001-07-31 06:05:05 +00:00
/*-
* Copyright (c) 1997 Berkeley Software Design, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Berkeley Software Design Inc's name may not be used to endorse or
* promote products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: BSDI: pmap.v9.h,v 1.10.2.6 1999/08/23 22:18:44 cp Exp
* $FreeBSD$
*/
#ifndef _MACHINE_TSB_H_
#define _MACHINE_TSB_H_
Minimal testing has shown that a 4 page tsb is a nice sweet spot for current work loads. It tapers off after that as gcc's working set generally just fits. compiling bin/csh: TSB_PAGES = 2 213.33 real 77.59 user 110.01 sys TSB_PAGES = 4 116.43 real 75.78 user 19.16 sys TSB_PAGES = 8 119.27 real 76.38 user 18.12 sys Testing by: tmm
2002-02-27 06:18:02 +00:00
#define TSB_PAGES_SHIFT (2)
Allow the user tsb to span multiple pages. Make the default 2 pages for now until we do some testing to see what's best. This gives a massive reduction in system time for processes with a relatively large working set. The size of the tsb directly affects the rss size that a user process can keep mapped. When it starts to get full replacements occur and the process takes a lot of soft vm faults. Increasing the default from 1 page to 2 gives the following before and after numbers for compiling vfs_bio.c: before: 14.27 real 6.56 user 5.69 sys after: 8.57 real 6.11 user 1.62 sys This should make self hosted builds more tolerable.
2002-02-26 02:37:43 +00:00
#define TSB_PAGES (1 << TSB_PAGES_SHIFT)
#define TSB_BSHIFT (TSB_PAGES_SHIFT + PAGE_SHIFT)
1. Implement an optimization for pmap_remove() and pmap_protect(): if a substantial fraction of the number of entries of tte's in the tsb would need to be looked up, traverse the tsb instead. This is crucial in some places, e.g. when swapping out a process, where a certain pmap_remove() call would take very long time to complete without this. 2. Implement pmap_qenter_flags(), which will become used later 3. Reactivate the instruction cache flush done when mapping as executable. This is required e.g. when executing files via NFS, but is known to cause problems on UltraSPARC-IIe CPU's. If you have such a CPU, you will need to comment this call out for now. Submitted by: jake (3)
2002-01-02 18:49:20 +00:00
#define TSB_BSIZE (1UL << TSB_BSHIFT)
#define TSB_SIZE (TSB_BSIZE / sizeof(struct tte))
Remove support for multi level tsbs, making this code much simpler and much less magic, fragile, broken. Use ttes rather than sttes. We still use the replacement scheme used by the original code, which is pretty cool. Many crucial bug fixes from: tmm
2001-12-29 08:15:43 +00:00
#define TSB_BUCKET_SHIFT (2)
#define TSB_BUCKET_SIZE (1 << TSB_BUCKET_SHIFT)
#define TSB_BUCKET_ADDRESS_BITS \
1. Implement an optimization for pmap_remove() and pmap_protect(): if a substantial fraction of the number of entries of tte's in the tsb would need to be looked up, traverse the tsb instead. This is crucial in some places, e.g. when swapping out a process, where a certain pmap_remove() call would take very long time to complete without this. 2. Implement pmap_qenter_flags(), which will become used later 3. Reactivate the instruction cache flush done when mapping as executable. This is required e.g. when executing files via NFS, but is known to cause problems on UltraSPARC-IIe CPU's. If you have such a CPU, you will need to comment this call out for now. Submitted by: jake (3)
2002-01-02 18:49:20 +00:00
(TSB_BSHIFT - TSB_BUCKET_SHIFT - TTE_SHIFT)
Remove support for multi level tsbs, making this code much simpler and much less magic, fragile, broken. Use ttes rather than sttes. We still use the replacement scheme used by the original code, which is pretty cool. Many crucial bug fixes from: tmm
2001-12-29 08:15:43 +00:00
#define TSB_BUCKET_MASK ((1 << TSB_BUCKET_ADDRESS_BITS) - 1)
#define TSB_KERNEL_SIZE \
((KVA_PAGES * PAGE_SIZE_4M) / sizeof(struct tte))
#define TSB_KERNEL_MASK (TSB_KERNEL_SIZE - 1)
#define TSB_KERNEL_VA_MASK (TSB_KERNEL_MASK << TTE_SHIFT)
extern struct tte *tsb_kernel;
Flesh out the sparc64 port considerably. This contains: - mostly complete kernel pmap support, and tested but currently turned off userland pmap support - low level assembly language trap, context switching and support code - fully implemented atomic.h and supporting cpufunc.h - some support for kernel debugging with ddb - various header tweaks and filling out of machine dependent structures
2001-07-31 06:05:05 +00:00
extern vm_offset_t tsb_kernel_phys;
Remove support for multi level tsbs, making this code much simpler and much less magic, fragile, broken. Use ttes rather than sttes. We still use the replacement scheme used by the original code, which is pretty cool. Many crucial bug fixes from: tmm
2001-12-29 08:15:43 +00:00
static __inline struct tte *
tsb_vpntobucket(pmap_t pm, vm_offset_t vpn)
Flesh out the sparc64 port considerably. This contains: - mostly complete kernel pmap support, and tested but currently turned off userland pmap support - low level assembly language trap, context switching and support code - fully implemented atomic.h and supporting cpufunc.h - some support for kernel debugging with ddb - various header tweaks and filling out of machine dependent structures
2001-07-31 06:05:05 +00:00
{
Remove support for multi level tsbs, making this code much simpler and much less magic, fragile, broken. Use ttes rather than sttes. We still use the replacement scheme used by the original code, which is pretty cool. Many crucial bug fixes from: tmm
2001-12-29 08:15:43 +00:00
return (&pm->pm_tsb[(vpn & TSB_BUCKET_MASK) << TSB_BUCKET_SHIFT]);
Flesh out the sparc64 port considerably. This contains: - mostly complete kernel pmap support, and tested but currently turned off userland pmap support - low level assembly language trap, context switching and support code - fully implemented atomic.h and supporting cpufunc.h - some support for kernel debugging with ddb - various header tweaks and filling out of machine dependent structures
2001-07-31 06:05:05 +00:00
}
Remove support for multi level tsbs, making this code much simpler and much less magic, fragile, broken. Use ttes rather than sttes. We still use the replacement scheme used by the original code, which is pretty cool. Many crucial bug fixes from: tmm
2001-12-29 08:15:43 +00:00
static __inline struct tte *
tsb_vtobucket(pmap_t pm, vm_offset_t va)
Flesh out the sparc64 port considerably. This contains: - mostly complete kernel pmap support, and tested but currently turned off userland pmap support - low level assembly language trap, context switching and support code - fully implemented atomic.h and supporting cpufunc.h - some support for kernel debugging with ddb - various header tweaks and filling out of machine dependent structures
2001-07-31 06:05:05 +00:00
{
Remove support for multi level tsbs, making this code much simpler and much less magic, fragile, broken. Use ttes rather than sttes. We still use the replacement scheme used by the original code, which is pretty cool. Many crucial bug fixes from: tmm
2001-12-29 08:15:43 +00:00
return (tsb_vpntobucket(pm, va >> PAGE_SHIFT));
Flesh out the sparc64 port considerably. This contains: - mostly complete kernel pmap support, and tested but currently turned off userland pmap support - low level assembly language trap, context switching and support code - fully implemented atomic.h and supporting cpufunc.h - some support for kernel debugging with ddb - various header tweaks and filling out of machine dependent structures
2001-07-31 06:05:05 +00:00
}
Remove support for multi level tsbs, making this code much simpler and much less magic, fragile, broken. Use ttes rather than sttes. We still use the replacement scheme used by the original code, which is pretty cool. Many crucial bug fixes from: tmm
2001-12-29 08:15:43 +00:00
static __inline struct tte *
tsb_kvpntotte(vm_offset_t vpn)
Flesh out the sparc64 port considerably. This contains: - mostly complete kernel pmap support, and tested but currently turned off userland pmap support - low level assembly language trap, context switching and support code - fully implemented atomic.h and supporting cpufunc.h - some support for kernel debugging with ddb - various header tweaks and filling out of machine dependent structures
2001-07-31 06:05:05 +00:00
{
Parameterize the size of the kernel virtual address space on KVA_PAGES. Don't use a hard coded address constant for the virtual address of the kernel tsb. Allocate kernel virtual address space for the kernel tsb at runtime. Remove unused parameter to pmap_bootstrap. Adapt pmap.c to use KVA_PAGES. Map the message buffer too. Add some traces. Implement pmap_protect.
2001-10-20 16:17:04 +00:00
return (&tsb_kernel[vpn & TSB_KERNEL_MASK]);
Flesh out the sparc64 port considerably. This contains: - mostly complete kernel pmap support, and tested but currently turned off userland pmap support - low level assembly language trap, context switching and support code - fully implemented atomic.h and supporting cpufunc.h - some support for kernel debugging with ddb - various header tweaks and filling out of machine dependent structures
2001-07-31 06:05:05 +00:00
}
Remove support for multi level tsbs, making this code much simpler and much less magic, fragile, broken. Use ttes rather than sttes. We still use the replacement scheme used by the original code, which is pretty cool. Many crucial bug fixes from: tmm
2001-12-29 08:15:43 +00:00
static __inline struct tte *
tsb_kvtotte(vm_offset_t va)
Flesh out the sparc64 port considerably. This contains: - mostly complete kernel pmap support, and tested but currently turned off userland pmap support - low level assembly language trap, context switching and support code - fully implemented atomic.h and supporting cpufunc.h - some support for kernel debugging with ddb - various header tweaks and filling out of machine dependent structures
2001-07-31 06:05:05 +00:00
{
Remove support for multi level tsbs, making this code much simpler and much less magic, fragile, broken. Use ttes rather than sttes. We still use the replacement scheme used by the original code, which is pretty cool. Many crucial bug fixes from: tmm
2001-12-29 08:15:43 +00:00
return (tsb_kvpntotte(va >> PAGE_SHIFT));
Flesh out the sparc64 port considerably. This contains: - mostly complete kernel pmap support, and tested but currently turned off userland pmap support - low level assembly language trap, context switching and support code - fully implemented atomic.h and supporting cpufunc.h - some support for kernel debugging with ddb - various header tweaks and filling out of machine dependent structures
2001-07-31 06:05:05 +00:00
}
Wrap long lines.
2002-02-27 00:28:35 +00:00
typedef int (tsb_callback_t)(struct pmap *, struct pmap *, struct tte *,
vm_offset_t);
1. Implement an optimization for pmap_remove() and pmap_protect(): if a substantial fraction of the number of entries of tte's in the tsb would need to be looked up, traverse the tsb instead. This is crucial in some places, e.g. when swapping out a process, where a certain pmap_remove() call would take very long time to complete without this. 2. Implement pmap_qenter_flags(), which will become used later 3. Reactivate the instruction cache flush done when mapping as executable. This is required e.g. when executing files via NFS, but is known to cause problems on UltraSPARC-IIe CPU's. If you have such a CPU, you will need to comment this call out for now. Submitted by: jake (3)
2002-01-02 18:49:20 +00:00
Remove support for multi level tsbs, making this code much simpler and much less magic, fragile, broken. Use ttes rather than sttes. We still use the replacement scheme used by the original code, which is pretty cool. Many crucial bug fixes from: tmm
2001-12-29 08:15:43 +00:00
struct tte *tsb_tte_lookup(pmap_t pm, vm_offset_t va);
void tsb_tte_remove(struct tte *stp);
struct tte *tsb_tte_enter(pmap_t pm, vm_page_t m, vm_offset_t va,
struct tte tte);
Flesh out the sparc64 port considerably. This contains: - mostly complete kernel pmap support, and tested but currently turned off userland pmap support - low level assembly language trap, context switching and support code - fully implemented atomic.h and supporting cpufunc.h - some support for kernel debugging with ddb - various header tweaks and filling out of machine dependent structures
2001-07-31 06:05:05 +00:00
void tsb_tte_local_remove(struct tte *tp);
Adapt the tsb_foreach interface to take a source and a destination pmap so that it can be used for pmap_copy. Other consumers ignore the second pmap. Add statistics gathering for tsb_foreach. Implement pmap_copy.
2002-02-23 20:25:20 +00:00
void tsb_foreach(pmap_t pm1, pmap_t pm2, vm_offset_t start, vm_offset_t end,
1. Implement an optimization for pmap_remove() and pmap_protect(): if a substantial fraction of the number of entries of tte's in the tsb would need to be looked up, traverse the tsb instead. This is crucial in some places, e.g. when swapping out a process, where a certain pmap_remove() call would take very long time to complete without this. 2. Implement pmap_qenter_flags(), which will become used later 3. Reactivate the instruction cache flush done when mapping as executable. This is required e.g. when executing files via NFS, but is known to cause problems on UltraSPARC-IIe CPU's. If you have such a CPU, you will need to comment this call out for now. Submitted by: jake (3)
2002-01-02 18:49:20 +00:00
tsb_callback_t *callback);
Flesh out the sparc64 port considerably. This contains: - mostly complete kernel pmap support, and tested but currently turned off userland pmap support - low level assembly language trap, context switching and support code - fully implemented atomic.h and supporting cpufunc.h - some support for kernel debugging with ddb - various header tweaks and filling out of machine dependent structures
2001-07-31 06:05:05 +00:00
#endif /* !_MACHINE_TSB_H_ */
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